Because of the nature of the film, shots need to be over exposed by one or two stops to achieve correct exposure on developing.

Photometers are used to determine the correct exposure in photography.

It featured a built-in light metering system to set the correct exposure.

When both sides were equally lit, the dial controlling the variable light showed the correct exposure.

Flash meters are used in flash photography to verify correct exposure.

Such measurements enable the photographer to choose the right photo paper and the correct exposure, obviating experiments with test strips.

Some of the higher-end cameras used this notch to determine the correct exposure, or to set the light meter, if so equipped.

On the screen a birthday party scene appears, and the viewer is asked to choose the correct exposure by metering various points in the scene.

This allowed the user to take a number of spot meter readings, all of which were used by the camera to calculate the correct exposure.

Safety Shift will let the camera reduce the aperture until it can achieve a correct exposure at maximum shutter speed.